Rinnai is the #1 selling tankless water heater brand in North America and the largest gas appliance manufacturer in Japan. Founded in 1920 in Nagoya, Japan, Rinnai has over a century of engineering experience in water heating and gas appliance technology. The US subsidiary, Rinnai America Corporation, has operated from Peachtree City, Georgia since 1974 and has sold over 3 million tankless units in North America.

Rinnai's product lineup spans tankless water heaters (gas and electric heat pump), condensing boilers, direct vent furnaces, and wall heaters. The company was the first major tankless brand to establish US assembly operations, signaling long-term commitment to the North American market. Rinnai products are sold in 79 countries worldwide.

For homeowners replacing a conventional tank water heater, Rinnai tankless units deliver endless hot water in a compact footprint. High-efficiency condensing models qualify for federal tax credits, and the energy savings from eliminating standby heat loss can offset the higher upfront cost within a few years. Rinnai's established dealer network means parts and service are widely available.